Grinding-mill



t e e L m LN ml Um ON Patented Oct. 20, 1885.

WITNESSES:

DTVENTOR vyfi ATTORNEYS.

N. PETERS. Pholo-Lilhcgnphar, Washinginn. D. c.

4 Sheets-Sheet 2.

(No Model.

H. CUTLER. GRINDING MILL. No. 328,656. Patented'Oot. 20, 1885.

WITTIJEfiES I V ITWENTOR g &

ATTORNEYS.

N. PETERS. PhowLithognphar. Wahingwn. n. c.

{No.Model.) 4 Sheets-Sheet 3. H. CUTLER.

- GRINDING MILL.

Patented 001;. 20, 1885.

WITNESSES @W )6.

[N VENTOR ATTORNEYS.

4 Sheets-Sheet 4.

(No Model.)

H. CUTLER.

GRINDING MILL.

No. 328,656. Patented Oct. 20, 1885.

V 0 Z 1% Z: H i'z /6 WITNESSES %INVENTOR I fi i BY M03 ATTORNEYS.

N. PETERS. Phnlouihcgnphan Wnshinglnn. n, c.

UNITED STATES Fries.

PATENT GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 328,656, dated October 20, 1885.

Application filed December 13, 1884. Serial No.150,275. (No model.)

To all whom it may concern.-

Be it known that I, HENRY CUTLER, of North Vilbraham, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Gri nding-Mills, of which the following is a full, clear, and exact description.

My improvements relate to portable mills of the vertical-disk type, and have for their objects to provide for the accurate setting and adjustment of the stones to compensate for their wear and to allow of the stationary stone being" dressed without removal from the case.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate cor-' responding parts in all the figures.

Figure l is a side elevation of the mill complete. Fig. 2 is a plan View with the case and stones in section on a central horizontal line. Fig. 3 is a vertical longitudinal section of the mill. Fig. 4 is a erosssectiou on line as x of Fig. 1. Fig. 5 is a view of the hack of the runner stone, showing. its adjustable box. Fig. 6 is asectional view, on aneularged scale, of the section B of the casing, the fixed stone, the attaching-plate therefor, the studs on the same projecting through the rear plate, the retaining-nuts, and the tubular washers. Fig. 7 is a perspective view, on an enlarged scale, of the under side of the turn-table frame, and Fig. 8 is a perspective view of the upper side thereof. Fig. 9 is a view showing, among other parts,the teed-operating mechanism, the shoe being in section.

A is the supporting-frame of the mill, B, the case, 0, the stationary stone; D, the running stone; E, the shaft; F, the driving-pulley; G, the feed-hopper, and H the feedshoe.

The case B inclosing the stones is formed of a cast-iron portion, B, having lateral arms a, the space between arms a being filled out with sheet-metal sections 2). The sections or arms a serve to support a cross-plate, c, to which the inner journal-box d is attached, as hereinafter specified, and on the arms a are formed the trunuions e e that are sustained in theside boxes, fiwhereby the case B is allowed to swing in a vertical plane. In the outer end of the case are holes for cylindrical studs that project from the plate k, that is fixed to the back of the stationary stone. On these cylindrical studs tubular washers i" are placed, and nuts 1' are screwed onto the ends of thestudsto hold the plate h and the washers firmly in place. \Vhen the fixed stone 0 is new, the washers t" are all placed on the studs outside of the back plate of the casing, and as the stone begins to wear away the washers are transferred,oue at a time, from the outside to the inner side of the casing, which causes the face of fixed stone to lie in the proper plane. (See Fig. 6.) The washers v? are of equal length. and each represents the distance which the stone is to be set forward at one time. By these means the stones are made interchangeable without regard to thickness.

The disk 71/, covering the back of stone 0, is formed with a horizontal flange or shelf, k, that projects through an opening in the back of case B, and to this shelf is attached the end journal-box, l, of the shaft.

As before stated, the innerjournal box, d, is supported on the plate asecured to the arms a of the case, and the outer journal-box, Z, is supported on a shelf, it, formed on the section B of the ease. Said boxes support the shaft E and the runuer-stoue. The case B with these parts can be turned on its trunnions e to bring the stones into a horizontal position for the purpose of dressing the fixed stone 0 without the necessity of removing it from the part B of the casing. Before the stone 0 can be dressed, sheet-iron sections 1), the shaft E, and I the runner-stone D must of course he removed.

The runningstone D is attached to the shaft and secured thereon by means of the disk on, that has formed upon its center ahalf-box, n, projecting into the eye of the stone,and is also fitted with a plate, 0, carrying the halfbox a. The plate 0 is attached to disk in by bolts and nuts 1), and, as shown in Fig.2,

there is a wedge or headed key-bolt, q, pas ing through box a into a wedge shap (1 space between box a and a flange on disk at, so that when the bolt is drawn endwise by means of its nut the box a is pressed closely against the shaft. The two boxes are clamped to the shaft by the bolts and nuts 0', which are to be loosened when the stoneis to be shifted that is, when the shaft E and the stone are to be removed to get at the stone 0 for dressing it.

t.o support the shaft.

The two side boxes, f,supporting the case B by its trunnions, are carried on an iron turntable frame,constructed as follows: The boxes are formed on plates 8, resting on the top of frame A,and on the under sides of theseplates are circular tongues s, entering grooves in the top of the frame or in plates on the top of the frame. The plates 8 at each end are connected by semicircular bars t,that extend below case B far enough to allow the latter to swing on its trunnions. The plates 8 and bars tform in plan View a rectangular frame. The two curved bars t are connected by a plate, u, at the bottom, which plate is centered by a socki5 et, u, on its under side, into which projects a boss, u], on a cross plate, u supported on cross-timbers A of the frame A. This con struction allows the whole frame with the boxesftov swing right and left, the plates 8 moving in the circular grooves on frame A. The pin a pivotally connects the swiveled frame to the cross-plate a As shownin Figs. 2 and 4, there are guybolts a hooked to horns on cross-plate c, and

these bolts pass through frame A and have nuts on their ends, whereby the turn-table frame is held in any position as desired. For adjusting and leveling the shaft, and for regulating the distance between the stones, the

construction and arrangement are as follows: The cross-plate c,connecting the two arms a of case B, is forrnedwit-h a shelf or flange, b, that supports a swiveling plate, 0, that rests on a stud and is fastenedby a pivot-bolt, d. In plate 5 c are slots that receive the bolts 6, that pass through wings formed on journal-box (1, so as lofasten the box to the swivel-plate. Setscrewsf are also provided to hold the box in place.

When the shaft is in thehorizontalposition,

a washer under the center bolt of the swivelplate 0" enters the upper. end of a hollow col,- umn, c, thatrises from the bed-frame, so as The lower end of the 5 column stands on an iron bracket, d, that is supported by two set-screws, so that the shaft can be raised or lowered. It can be moved sidewise by adjustment of the guy-rodsa, that connect to the plate a. A bolt, f, with a T- head passes through a slot in the shelf b of plates 1), and extends down under the milli'rame, where it connects with.v a lever, 9", that is worked by a. screw, If, to draw, the shaft and parts down firmly upon the column.

At the ends of the mainframe there are leersg their endsat one side of the mill. be-

ing connected by rods h to posts on the trunnton-box, while their opposite ends are con.- nected by rods 13 to av rack, 70, which iswithin 6c ahousing, linear the feed end of the machine. The levers g carry step-boxes for the pivot ends of the shaft. ion, L, on the end of a weightedilever, m, the outer end of which is supported by the hook end of a, vertical adjusting-screw, d, that is fitted. in apost, 0., By this arrangement the weighted lever, acting through the rack ,k

The rack k engages a pin-- and rods 45, presses the shaft endwise and maintains the running stone at the proper dis tance from the stationary stone, according to the fineness of grinding desired, and by raising or lowering the screw q the downward or upward movement of lever m is regulated; but the screw allows the lever to rise in case an obstruction passes between the stones. There are turn-buckles in the rods h and i for shortening up the connections as the stones wear. At the end of the shaft next the drivingpulley the frame A is provided with an arch, 1), formed with a box, r, having fixedly secured thereto a tube or sleeve, 8. In this sleeve is a sliding step, t, whose pivot is against the lever g, and its inner end receives the pivot-box u,'which is on the end of the shaft. Theboxuissmallerthanthesleeve, and it is retained centrally by a spring contained in a recess in the box, and resting on the bottom of the sleeve, or a loose stud may be placed in the recess between the lower end of a the spring and the sleeve, so that the box can accommodate itself to the position of the pivot without friction on the sides of the sleeve. The stud being separate from the sleevedoes not of course interfere with the longitudinal adjustment of the shaft E and its box. The sleeve 3 forms an oil-box that protects the bearings from dust, and the construction shown allows removal of the box u without disturbing other parts of the mill.

The oil-box sleeve sf also serves as a bearing for the collar a of the belt-shifting device. There are segmental flanges on the collar, between which are fitted. three cone-pulleys, to, that have their larger ends close up to the driving-pulley. The cone-pulleys are within about one-half of the circle described by the drive-pulley F.

In practice I provide any ordinary shifter for throwing the belt off of the driving-pulley F. When thrown from the drive-pulley, the belt will fall upon the sleeve a which. will cause said belt to become slack and motionless. The belt in. this position does not touch the conical rollers 10, which, in the normal position of the sleeve a", are below the shaft E, as shown in the drawings. If the belt is to be shifted from the sleeve 0. toits position on the drive'pulley, the lever b? is forced. down, and this throws the pulleys w. outward toward that side of the pulley around which the belt passes. The curves described by the conical pulleys and, the drive-pulleys are now on the same are. This movementlof course-tightens the belt just as it wouldibe: if inplace on the drive-pulley, and the basesqof the conical-shaped pulleys being next. to the pulley the belt will ride up said pulleys and start the drive-pulley F and be drawn. to. its proper place, thereon. To enable the belt ITO to more readily passfrom the conical pulleys tothe drive-pulley, the adjacent edge of the latter is beveled, as clearly shown-in the drawings.

The feed-shoe H is suspended loosely and centrally from the hopper G by means of hangers H, so that it will be free to rock. The under side of the shoe has a downward-extending arm, 6, that projects into the path of the beater 11 on the shaft E, so that a vibratory movement will be given the shoe by said beater. A lever, Z is pivoted at its center to the rear end of the casing B,and one end of the said lever extends across the adjacent edge of the shoe through a loop, H and the other end extends across the upper face of the lever m. If the lever m is raised to throw the stones apart, it will raise that end of the lever I resting thereon, which will of course depress the opposite end, and this in turn will depress the side of the shoe on which it rests, and thereby cause the dependingarm t to be thrown out of the path of the heater to stop the vibratory movement and the feed.

\Vhen the stones are to be adjusted, the case, with the stones inclosed, is turned up to bring the stones on a horizontal line. XVhile in this position the runner-stone, with the shaft through its center, is placed on the stationary stone with the two faces arranged so that they stand in justsuch relation to each other as they should when the mill is in operation. One end of the shaft is already fixed in the outer box, and it is only necessary to secure the other end to retain the stones in proper adjustment. This is done by sliding the box (2 down on the shaft until its wings strike the swivel-plate, which assumes a position corresponding to the line of the shaft. Thepivotbolt is then drawn tightly, the box bolted to the plate, and the set-screws run up. Thus both ends of the shaft are secured to the case, the stone faces are parallel, and all parts are carried by the case. The case can then be turned to bring the stones vertical, and secure them in place by the guy-bolts. As the position of the mill-shaft is frequently changed to accommodate the faces of the stones, it is nec essary to change the position of the case,

sov that the n1ill-shaft can be kept in line with the power-shaft. The guy'bolts moving the turntable frame and the set-screws for raising the supporting-column permit such adjustment without disturbing the adjustment of the stones.

It is well known that mills do the best work when the faces of the stones remain perfectly parallel and the wear is even; but in vertical mills this even wear of the stones cannot be maintained on account of the uneven wear of the boxes and giving way of the frame under the strain of the driving-belt, which causes the stationary stone to wear most at one side of the center, and the edges of the running stone to wear faster than the middle portion, so that before long the mill becomes unfit for doing good work, and must be overhauled at great expense of time and labor.

By the improved construction described hereinbefore, the stones being first set accurately, the adjustment is readily maintained,

both as regards the relation of the stones to each other and of the shaft and the running stone, by resetting the boxes before the wear has caused a change in the angle of the stonefaces, and thus the uneven wear is reduced to a minimum. I may also use larger stones than is usually practicable in this class of mills.

Having ih us described my invention, I claim as new and desire to secure by Letters Patent-- 1. The combination, with the main frame A, the casing B, comprising the cast-metal section B, provided with trunnions e and lateral arms a, and sheet-metal sections 1), and the fixed and running stones within said casing, of the swiveled frame comprising the plates 8, the journal-boxes f thereon, the curved bars f, connecting the ends of said plates, and the bar or plate a, connecting the plates t at the center of their curves, and bearing on the casing B, substantially as set forth.

2. The casing B, comprising the cast-metal section B, having lateral arms a and sheet metal portions 1), secured to said arms, substantially as set forth.

3. The casing B, comprising the cast-metal section B, having lateral arms a, and trunnions e integral therewith, the sheet-metal sections 1), and the cross-plate c, the swiveled plate 0, and box d, in combination with the stones D O, and the disk It, secured to the stone 0 and provided with the shelf is and box Z,

substantially as set forth.

l. In a grinding-mill, the disk m, adjusta ble plate 0, half-boxes a a, and key-bolt q, combined with the running-stone and shaft, substantially as and for the purpose set forth.

5. The combination, with the frame A, having sen'iicircular grooves in the upper surfaces of its side bars, of a swiveled frame provided With side plates, 8. semicircular tongues s on the under side thereof entering said grooves, boxes f onv said plates, and the casing B,having trunnions e, journaled in said boxes, substantially as set forth.

6. The combination, with the main frame, the horizontal swiveled U-shaped frame therein, and the casing B, jonrnaled to swing vertically in said swiveled frame, of the shaft E, bearings therefor connected with the casing B, the runner-stone on said shaft, the fixed stone secured to the back plate of the casing, and mechanism connect-ed with the main frame and the swiveled frame, for adjusting the said swiveled frame in any desired position, whereby a horizontal and vertical adjustment is afforded the casing, substantially as set forth.

7. In a grinding-mill, the casing, a fixed and a runner stone, shaft, boxes, and trunnions, in combination with a swiveled frame having boxes for the trunnions and rods for horizontally adjusting the position of the casing, substantially as set forth.

8. The combination of the casing having trunnions, fixed and runner stones, inner and outer shaft-boxes, a swiveled frame in which the casing is journaled, and a vertically-adj ustable post below the inner box, and means for clamping the casing on the said post, substantially as set forth.

9. The combination of the casing, the runner and fixed stones therein, the boxes cl Z, the swiveled plate 0, cross-plate 0, provided with the flange b, the swiveled frame in which said casing is journaled, the tubular post 0 the pivot-bolt (Z, the vertically adjustable bracket d T-headed bolt f lever 9 and screw h substantially as set forth.

10. The combination of the casing, the fixed and runner stones therein, the runner-stone shaft, the shelf k, a box, Z, the cross-plate c, flange b, swiveling plate 0, box d,-bolts e, and the set-screws f for holding the box in place, substantially as set forth.

11. The combination, in a grindingmill, with the stones, the runner shaft, and the frame, of the arch 1), having a box, 70, sleeve 8, fixed within said box, removable box a on the end of the shaft, and the removable step t, and adjustable bearings or centers for the said step and the outer end of the shaft, substantially as set forth.

12. The combination, with the frame and the runner-shaft of a grinding-mill, of the arch 0, box r, the fixed sleeve 8, the removable pivot-box u on the end of the shaft within sleeve 8, a spring interposed between the box and the interior of the sleeve, and the removable step Z, and the connected adjusting-levers g, substantially as set forth.

13; The combination, with the runner-shaft and the frame of a grinding-mill, of the arch 1 box 1", fixed sleeve .9, the removable pivotbox it, having a recess in its side, the spring therein/the separate pin s,interposed between the spring and the inner surface of the sleeve, and the removablestep t, and the connected adjusting-levers g, substantially as set forth.

14. The combination, with the casing, the fixedand runner stones therein, the swiveled frame in which said casing is journaled, the runner-stone shaft, the horizontal levers 9, having bearings for the opposite ends of the shaft, the guy-rods h h,connecting the levers g at one end with the swiveled frame, the rods Z, connecting the opposite ends of said levers, the rack 70', the pinion Z, and the weighted lever m, substantially as set forth.

15. The combination, with the casing, the fixed and runner stones therein, the runnershaft, the swiveled frame in which the casing is journaled, the horizontal levers 9, having bearings for the ends of the shaft, the guyrods h, connecting one end of the levers g to the swiveled frame, the rods 1, the rack is, pinion Z, weighted lever m, and the vertical adjustable screw-hook q, substantially as set forth.

16. In a mill, the combination, with the back plate having apertures, of the disk h, having a shaft-eye, the studs 5/, tubular washers Z, the nuts Z, and the shelf it, having a box, 6 5 Z, thereon in line with the shaft-eye, substantially as set forth.

17. The combination, with the runner-shaft of a grinding-mill, having the drive-pulley F, of the frame provided with the arch p, and box r, the sleeve 8 extending through the box r, adjacent to the pulley F, and a belt-shifting device mounted on the exterior of said sleeve 8, substantially as set forth.

18. The combination,with the runner-shaft of a mill,having the drive-pulley F, of the frame provided with the fixed sleeve 8, the collar a journaled on the fixed sleeve, the conical pulleys w, j ournaled in a semicircle on segmental arms of the collar with the bases of the cones adjacent to the drive-pulley, and a lever for operating the collar a and its pulleys.

19. In a mill, the combination, with the shaft E, having a beater, i the levers g, rods h 12, rack is, and operating-lever m, of the vibratory feed-shoe H, su=pended centrally below the hopper, and having the arm Z and the centrally-pivoted lever Z having one end'resting on the upper side of the lever m, and its opposite end resting on the adjacent edge of the shoe, whereby when the lever m is raised the opposite end of lever Z will be depressed to stop the feed, as described.

20. In a mill, the vibratory feed-shoe H, suspended centrally below the hopper, in com- 5 bination with: the casing B, centrally-pivoted lever Z on the back plate thereof, and the weighted lever m, substantially as set forth.

HENRY CUTLER.

Witnesses:

W. F. BENNETT, J AMES E. MCINTIRE. 

